div[class^="box"]
{
    width: 200px;
    height: 100px;
    background: lightblue;
}

div[class="box1"]
{
    border: 1px solid black;
    border-radius: 50px;
    padding: 20px;
}
div[class="box2"]
{
    margin: 10px;
}
div[class="box3"]
{
    margin: 10px;
}

div[class="box4"]
{
    
    /* padding-top: 1px; */
    overflow: hidden;
}
div[class="box5"]
{
    width: 100px;
    height: 50px;
    background: red;
    margin: 10px;

    color:whitesmoke;
    text-align: center;
    line-height: 50px;
}